3 Policies Regarding CONSERVATION of World Heritage Properties
3.5 Factors affecting properties
3.5.9 Other human activities
Conservation of cultural and natural heritage is at the core of the Convention. Conservation includes effective and active measures that can be taken by States Parties to ensure the identification, protection, presentation and transmission of heritage.
There is no single definition of conservation in relation to both cultural and natural heritage. However, with regards to cultural heritage ‘all operations designed to understand a property, know its history and meaning, ensure its material safeguard, and, if required, its restoration and enhancement’ could be part of its conservation (Nara Document on Authenticity). Conservation of natural heritage refers to the protection, care, management and maintenance of ecosystems, habitats, wildlife species and populations, within or outside of their natural environments, in order to safeguard the natural conditions for their long-term permanence (IUCN).
The Conservation theme includes policies related to protection, management, monitoring, impact assessments, factors affecting the properties, tourism and sustainable development.
Illegal activities (For example: Illegal extraction of biological resources (i.e. poaching), Blast fishing, cyanide fishing, Illegal extraction of geological resources (mining/fossils), Illegal trade, Illegal occupation of space, Illegal excavations, Illegal construction, Looting, Theft, Treasure hunting, Ghost nets (discarded fishing gear). Deliberate destruction of heritage (For example: Vandalism, Graffiti, Politically motivated acts, Arson). Military training. War. Terrorism. Civil unrest.
Synthesis based on relevant Committee decisions
The World Heritage Committee requests States Parties to take all measures possible to halt poaching in the property (based on Case law on decisions on the State of Conservation). 
 See for example Decisions , , .